Unloading apparatus



H. PEARSON.

' UNLOADING APPARATUS.

APPLICATION FILED JUNE 1. 1918.

3 SHEETS-SHEET Inventor;- Henry Pearson,

H. PEARSON.

UNLOADING APPARATUS.

APPLICATION FILED JUNE 1, ms.

Patented June 14, 1921.

3 SHEETS SHEET 2.

lnvenio'w': Henry lie-arson,

3 by MJ o-oqyjmmflylnmflg H.- PEARSON;

H UNLOADING APPARATUS.

APPLICATION FILED JUNE L 1918.

Patented J 11116 14,,- 1921 3 SHEETSSHEET 3- Fig-.5.

Inventor.-

Henry Pearson.

ays.

.gn 'rso STATES PATENT OFFICE.

HENRY PEARSON, or BRIGHTWOOD, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE J. G. BRILL COMPANY, or rHILADELrHIA, PENNSYLVANIA, A

I CORPORATION OF PENNSYLVANIA.

To all whom it may concern Be it known that I, HENRY PEARSON, a

I citizen of the United States, and a resident :bQdyID my invention,

thebody in'the position'which it normally of Brightwood, county of Hampden, and

State of Massachusetts, have invented an exclusively, concerned with a dumping body for vehicles of the class in which dumping" movement of the body is utilized to unlock the gate or closure of the receptacle, thereby to permit the load to be released from the discharge opening.

My invention will be best understood byreference to the following description, when taken in connection with the accompanylng drawings of one specific embodiment thereof, while its scope will be more particularly pointed out in the appended claims. 7

In the drawings: I

Figure 1 is a side elevation of a motor truck equipped with a "dumping body emoccupies, and in dotted lines an illustrative dumping position;

F 1g. .2 1s a rear elevation of a portion of the same on an enlarged scale; J I

Fig. 3 is a side elevation at the same scale as Fig. '2,showing in its normal position the locking and unlocking mechanism, and

portions ofthe ,body and its supporting frame; and p, g A A Fig. 4 is a view similar to Fig. and at the same scale, but partly in vertlcal section, showing the same parts in dumping position.

Referring to the drawings, and to theembodiment of. m invention which is illustratedtherein or purposes, of exemplification. I'have shown a common form of motor truck having a chassis frame-5, on which is supported a dumping body '6 comprising a receptacle7 having a discharge opening 8, which is normally closed by a gate 9, the

latter being preferably suspended from pivots 1O, whereby it is adapted to gravi- I tate toward an open position when the body a in a dumping posltion, and to'gravitate showing in full lines I UNLOADING APPARATUS.

Specification of Letters Patent. Patented n ne 14,, 1921.

Application fi1ed June 1, v

1918. Serial No. 237,683.

7 toward its closed position when the body is restored to its normal position, as will be evident from an inspection of Fig. 1.

The body may be mounted in any appropriate manner for tilting movement, where- I by its load may be dumped, but in the present example, I have shown the same fulcrumed on pivots 11 on brackets 12, the latter being secured to the chassis frame 5. My present invention isnot concerned with the mechanism for tilting the body to dump.

the load, but I have shown anillustrative dumping mechanism of common form, comprising a vertically extensible column 13,

on which is supported a winding drum or drums 14 for a cable or cables 15, connected to a frame 16, the latter being rigidly. secured to the receptacle 7. I

As a means for automatically locking and unlocking the gate 9, without requiring manual operation by the truck driver, I have shown mechanism which may be and preferably is in duplicate, though constructed in rightand left-hand arrangement, as best shown in Fig. 2. A description'of one'ofthese mechanisms will sufiice for both.

Each of these mechanisms may comprise a suitable latch 17,.engaging an appropriate abutment 18, the latter in the present example being in'the form of a bar, preferably an angle iron, which is secured to and extends laterally beyond thegate 9;, as best shown in Fig." 2. Preferably, the arrangement of the latch 17 is such that it tends to gravitate toward its locking position, and to that end, in the present example, it is arand'is mountedfon a pivot 19 to swing about a horizontal axis. This pivot may be connected by appropriate means to the supporting frame 5, so that tilting movement of the body 6 will be accompanied by fore-and-aft movement of said pivot and latch. To this" end, in the present example the pivot 19 is carried by an arm 20, the latter being secured to a rock-shaft 21 mounted in suitable bearings 22 and 23 on the under side of the receptacle 7, as best shown in Fig. 2. Also securedto this shaft is a second arm 24, best shown in Figs. 3 and .4, which is suitably connected to the frame 5, as by a link,'or preferably a shown in Fig. 2.

,ranged in a generally horizontal position,

P r of n s 2 best 7 WVhen, during the tilting movement of the body 6 about the axis of the pivots 11, the pivots 21 describe an arc struck from said axis as indicated inFigs. 3 and 4, the described connections impart a generally horizontal movement to the latch 17 This movement is utilized to cause the'latch to move in another direction to lock or unlock the gate, as the case may be. To this end, I have herein provided cooperating. means carried by the receptacle 7 and latch 17,

such means comprising inclined surfaces 26 and 27, best shown in Fig. 4. When the latch 17 is moved in a rearward direction, its inclined surface 27 rides up the stationary inclined surface 26, and said latch is lifted while being moved rearwardly, thereby releasing the gate 9, and allowing the latter to open as indicated by dotted lines in Fig. 1. When, on the other hand, during the restoration of the body to its normal position, the latch 17 moves in a forward direction, the inclined surfaces 26 and 27 allow the latch to gravitate toward its normal position. .During the downward and forward movement of the latch, the latter will ongage the abutment 18 of the gate 9, and

' pria tely connected to the links 25 in such a i ever, during the closing and locking of the T manner asit'o permit a yieldin action to take place between the latter and the frame 5. This spring may be otherwise appropriately arranged, but in the present example, it encircles a rod 29, which is provided with an ear 3O pivotally connected to said'links. The lower end of the spring bears against an abutment 31 carried by the rod 29,

while the upper end bears against an.

abutment 32, which in turn bears against a fixed abutment 83 in the form of a bracket secured to the. bracket 12. This spring may be sufiiciently heavy unyieldingly. to resist any ordinary pull tending to compress the same, such for example as that which is exerted by the load against the gate when the body is in its normal position. Under such conditions, any tendency to open the gate is resisted by the spring, When, howgate under the influence of the latch, an obstruction tends to prevent further closing .movement of the gate, thesprin is adapted to yield, thuslallowing the ho y to return to its normal position withoutbreakage of the parts.

While I have herein shown and described one specific form or embodiment of my invention for illustrative purposes, and have disclosed and discussed in detail the construction and arrangement incidental to one specific application thereof, it is to be understood that the invention is limited neither to the mere details or relative arrangement of parts, nor to its specific embodiment herein shown, but that extensive deviations from the illustrated form or embodiment may be made, without departing from the principles thereof.

Having thus described my invention, what I claim and desire by Letters Patent to secure is: g 1. In a load-discharging apparatus, the combination of a dumping receptacle having a. discharge opening, a gate normally closing said opening, and means including a normally unyielding spring and consequent upon movement of said receptacle to close said gate.

2. In a load-discharging. apparatus, the combination of a dumping receptacle having a discharge opening, a gate normally closing said opening, and means including a normally substantially unyielding spring to utilizemovement of said receptacle toward its normal position toclose said gate.

In a load-discharging apparatus, the combinatlon of a dumping receptacle having a discharge opening, a gate normally closing said opening, and means to utilize movement of said receptacle toward its normal position to close said gate, said means including a latch, and a spring constituting a normally unyielding latch actuating medium arranged to yield if and when said gate meets an obstruction during its closing movement,

i. In a load-discharging apparatus, the combination of a dumplng receptacle hav ng a discharge opening, a gate normally closing lid opening and carrying an abutment, a latch normally engaging said abutment and yieldinglylocking said gate, means consequent upon tilting movement of said receptacle to move said latch in a generally horizontal direction, and cooperating inclined surfaces carried by said receptacleand said latch to cause the latter to move in another direction to lock andunlock said gate.

'5. In a load-discharging apparatus, the combination of a dumping receptacle having a discharge opening, a gate normally closing saidopemng and carrymg an abutment, a latch normallyengaging sald abutment and locking said gate, means consequent upon tilting movement of said receptacle to move said latch in a generally horizontal direction, and means including a fixed support and a spring interposed between said sup port and said latch to permit thelatter to move said. gate with yielding pressure toward its closed position, and cooperating llO and including resilient means tending to move said gate toward a closed position when restrained by said latch.

7. In a load-discharging apparatus, the combination of a dumpingreceptacle having a discharge opening, a gate normally closing said opening, a latch normally locking said gate, a support on which said receptacle is mounted to tilt, and latch-operating means connecting said latch to said support, said latch-operating means including normally unyielding resilient means consequent upon movement of said receptacle toward its nor mal position to move said gate toward its closed position.

8. In a load-discharging apparatus, the combination of a dumping receptacle having a discharge opening, a gate normally closing said opening, a latch normally locking said gate, a support on which said receptacle is mounted to tilt, and latch-operating means connecting said latch to said support, said latch-operating means including means consequent upon movement of said receptacle toward its normal position to move said gate toward its closed position, and resilient -means to permit said receptacle to continue to move toward its normal position when said gate is obstructed and said latch is tending to move the same toward its closed position.

9. In a load-discharging apparatus, the combination of a dumping receptacle having a discharge opening, a gate normally closing said opening, a latch normally locking said gate, a support on which said receptacle is mounted to tilt, and latch-operating means connecting said latch to said support, said latch-operating means including means consequent upon discharging movement of receptacle to unlock said gate and consequent upon movement of said receptacle toward its normal position to move said gate toward its closed position, and yielding means to permit saidreceptaole to continue to move toward its normal position when said gate is obstructed and said latch is tending to move the same toward its closed position.

10. In a load-dischargingapparatus, the combination of a pivoted dumping receptacle having a discharge opening, a gate normally closing said opening, and gate locking and unlocking means comprising a latch which normally locks said gate, and means consequent upon pivotal movement of said receptacle about its pivotal axis to positively operate said latch in one direction to unlock said gate and yieldingly to operate said latch in another direction to lock said gate.

In testimony whereof, I have signed my name to this specification.

HENRY PEARSON. 

